libisofs/src/image.c

/*
 * Copyright (c) 2007 Vreixo Formoso
 * 
 * This file is part of the libisofs project; you can redistribute it and/or 
 * modify it under the terms of the GNU General Public License version 2 as 
 * published by the Free Software Foundation. See COPYING file for details.
 */

#include "libisofs.h"
#include "image.h"
#include "error.h"
#include "node.h"
#include "messages.h"

#include <stdlib.h>
#include <string.h>

/**
 * Create a new image, empty.
 * 
 * The image will be owned by you and should be unref() when no more needed.
 * 
 * @param name
 *     Name of the image. This will be used as volset_id and volume_id.
 * @param image
 *     Location where the image pointer will be stored.
 * @return
 *     1 sucess, < 0 error
 */
int iso_image_new(const char *name, IsoImage **image)
{
    int res;
    IsoImage *img;

    if (image == NULL) {
        return ISO_NULL_POINTER;
    }

    img = calloc(1, sizeof(IsoImage));
    if (img == NULL) {
        return ISO_MEM_ERROR;
    }

    /* local filesystem will be used by default */
    res = iso_local_filesystem_new(&(img->fs));
    if (res < 0) {
        free(img);
        return ISO_MEM_ERROR;
    }

    /* use basic builder as default */
    res = iso_node_basic_builder_new(&(img->builder));
    if (res < 0) {
        iso_filesystem_unref(img->fs);
        free(img);
        return ISO_MEM_ERROR;
    }

    /* create message messenger */
    res = libiso_msgs_new(&img->messenger, 0);
    if (res <= 0) {
        iso_node_builder_unref(img->builder);
        iso_filesystem_unref(img->fs);
        free(img);
        return ISO_MEM_ERROR;
    }
    libiso_msgs_set_severities(img->messenger, LIBISO_MSGS_SEV_NEVER, 
                               LIBISO_MSGS_SEV_FATAL, name, 0);

    /* fill image fields */
    res = iso_node_new_root(&img->root);
    if (res < 0) {
        libiso_msgs_destroy(&img->messenger, 0);
        iso_node_builder_unref(img->builder);
        iso_filesystem_unref(img->fs);
        free(img);
        return res;
    }
    img->refcount = 1;

    if (name != NULL) {
        img->volset_id = strdup(name);
        img->volume_id = strdup(name);
    }
    *image = img;
    return ISO_SUCCESS;
}

/**
 * Increments the reference counting of the given image.
 */
void iso_image_ref(IsoImage *image)
{
    ++image->refcount;
}

/**
 * Decrements the reference couting of the given image.
 * If it reaches 0, the image is free, together with its tree nodes (whether 
 * their refcount reach 0 too, of course).
 */
void iso_image_unref(IsoImage *image)
{
    if (--image->refcount == 0) {
        /* we need to free the image */
        iso_node_unref((IsoNode*)image->root);
        libiso_msgs_destroy(&image->messenger, 0);
        iso_node_builder_unref(image->builder);
        iso_filesystem_unref(image->fs);
        free(image->volset_id);
        free(image->volume_id);
        free(image->publisher_id);
        free(image->data_preparer_id);
        free(image->system_id);
        free(image->application_id);
        free(image->copyright_file_id);
        free(image->abstract_file_id);
        free(image->biblio_file_id);
        free(image);
    }
}

IsoDir *iso_image_get_root(const IsoImage *image)
{
    return image->root;
}

void iso_image_set_volset_id(IsoImage *image, const char *volset_id)
{
    free(image->volset_id);
    image->volset_id = strdup(volset_id);
}

const char *iso_image_get_volset_id(const IsoImage *image)
{
    return image->volset_id;
}

void iso_image_set_volume_id(IsoImage *image, const char *volume_id)
{
    free(image->volume_id);
    image->volume_id = strdup(volume_id);
}

const char *iso_image_get_volume_id(const IsoImage *image)
{
    return image->volume_id;
}

void iso_image_set_publisher_id(IsoImage *image, const char *publisher_id)
{
    free(image->publisher_id);
    image->publisher_id = strdup(publisher_id);
}

const char *iso_image_get_publisher_id(const IsoImage *image)
{
    return image->publisher_id;
}

void iso_image_set_data_preparer_id(IsoImage *image,
                                    const char *data_preparer_id)
{
    free(image->data_preparer_id);
    image->data_preparer_id = strdup(data_preparer_id);
}

const char *iso_image_get_data_preparer_id(const IsoImage *image)
{
    return image->data_preparer_id;
}

void iso_image_set_system_id(IsoImage *image, const char *system_id)
{
    free(image->system_id);
    image->system_id = strdup(system_id);
}

const char *iso_image_get_system_id(const IsoImage *image)
{
    return image->system_id;
}

void iso_image_set_application_id(IsoImage *image, const char *application_id)
{
    free(image->application_id);
    image->application_id = strdup(application_id);
}

const char *iso_image_get_application_id(const IsoImage *image)
{
    return image->application_id;
}

void iso_image_set_copyright_file_id(IsoImage *image,
                                     const char *copyright_file_id)
{
    free(image->copyright_file_id);
    image->copyright_file_id = strdup(copyright_file_id);
}

const char *iso_image_get_copyright_file_id(const IsoImage *image)
{
    return image->copyright_file_id;
}

void iso_image_set_abstract_file_id(IsoImage *image,
                                    const char *abstract_file_id)
{
    free(image->abstract_file_id);
    image->abstract_file_id = strdup(abstract_file_id);
}

const char *iso_image_get_abstract_file_id(const IsoImage *image)
{
    return image->abstract_file_id;
}

void iso_image_set_biblio_file_id(IsoImage *image, const char *biblio_file_id)
{
    free(image->biblio_file_id);
    image->biblio_file_id = strdup(biblio_file_id);
}

const char *iso_image_get_biblio_file_id(const IsoImage *image)
{
    return image->biblio_file_id;
}